**DO NOT MERGE**: Just testing my feature/pcie rebase

[bchalios]

Changes

License Acceptance

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CONTRIBUTING.md.

PR Checklist

• I have read and understand CONTRIBUTING.md.
• I have run tools/devtool checkbuild --all to verify that the PR passes
  build checks on all supported architectures.
• I have run tools/devtool checkstyle to verify that the PR passes the
  automated style checks.
• I have described what is done in these changes, why they are needed, and
  how they are solving the problem in a clear and encompassing way.
• I have updated any relevant documentation (both in code and in the docs)
  in the PR.
• I have mentioned all user-facing changes in CHANGELOG.md.
• If a specific issue led to this PR, this PR closes the issue.
• When making API changes, I have followed the
  Runbook for Firecracker API changes.
• I have tested all new and changed functionalities in unit tests and/or
  integration tests.
• I have linked an issue to every new TODO.

---

• This functionality cannot be added in rust-vmm.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 80.23%. Comparing base (d02902c) to head (d02902c).

Additional details and impacted files

@@              Coverage Diff              @@
##           feature/pcie    #5330   +/-   ##
=============================================
  Coverage         80.23%   80.23%           
=============================================
  Files               265      265           
  Lines             30817    30817           
=============================================
  Hits              24725    24725           
  Misses             6092     6092           

Flag	Coverage Δ
5.10-c5n.metal	79.97% <0.00%> (ø)
5.10-m5n.metal	79.97% <0.00%> (ø)
5.10-m6a.metal	79.17% <0.00%> (ø)
5.10-m6g.metal	76.43% <0.00%> (ø)
5.10-m6i.metal	79.97% <0.00%> (ø)
5.10-m7a.metal-48xl	79.16% <0.00%> (ø)
5.10-m7g.metal	76.43% <0.00%> (ø)
5.10-m7i.metal-24xl	79.94% <0.00%> (ø)
5.10-m7i.metal-48xl	79.94% <0.00%> (ø)
5.10-m8g.metal-24xl	76.42% <0.00%> (ø)
5.10-m8g.metal-48xl	76.43% <0.00%> (ø)
6.1-c5n.metal	80.01% <0.00%> (ø)
6.1-m5n.metal	80.01% <0.00%> (ø)
6.1-m6a.metal	79.22% <0.00%> (ø)
6.1-m6g.metal	76.43% <0.00%> (ø)
6.1-m6i.metal	80.01% <0.00%> (ø)
6.1-m7a.metal-48xl	79.20% <0.00%> (ø)
6.1-m7g.metal	76.43% <0.00%> (ø)
6.1-m7i.metal-24xl	80.02% <0.00%> (ø)
6.1-m7i.metal-48xl	80.03% <0.00%> (ø)
6.1-m8g.metal-24xl	76.42% <0.00%> (ø)
6.1-m8g.metal-48xl	76.42% <0.00%> (ø)

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